SYSTEM ID's (SID LIST)
System Identification Numbers, or SIDs, are 15-bit numeric identifiers used by cellular systems to identify the home system of a wireless carrier and by the cellular telephone to determine its roaming status. In the US, cellular SID's had originally been assigned and recorded by the FCC. In 2003 the FCC decided to privatize the function of assigning and recording cellular SIDs. Our lists are updated as changes are discovered. Note: Some of these files are large.
Go HERE to view them. And HERE is another for CricKet SIDs by market!
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